I want a shorter and friendly URL, and not to mention Jotform on it, neither my account name

There are 3 possible workarounds I know:

1. This is what users mostly do, by embedding the form to your webpage and use your webpage URL instead of the form URL.

2. You can use your custom domain name but this doesn't support HTTPS.  Guide: http://www.jotform.com/help/144-How-to-use-Custom-Domains-with-Jotform

3. Mask your form URLs with short URL generators like https://goo.gl/